200528311 ⑴ 九、發明說明 【發明所屬之技術領域】 本發明，是關於輪轂，特別是，裝設於自行車的車架 的自行車用輪轂。 【先前技術】 一般，設置於自行車的車輪的中央部的輪轂，是具備 ·’不可旋轉地裝設於自行車的車架（例如前叉）的輪轂軸 、及使輪轂對於軸可旋轉自如地裝設於輪轂軸的外周側的 輪轂體、及使輪轂體對於輪轂軸可旋轉自如地支撐的1對 的軸承（例如，專利文獻丨）。在輪轂軸的外周形成公螺 紋部，藉由安裝有於兩端的螺帽被裝設於車架。1對的軸 承，是角型的軸承，具備：具有滾珠承接面並裝設於輪轂 體的內周面的外輪、及具有滾珠按壓面並螺入輪轂軸的內 輪、及兩輪之間在周方向隔有間隔配置的複數滾動構件。 在軸承的內部爲了使旋轉圓滑而充塡了潤滑油。形成 於軸承的外輪的滾珠承接面是由朝軸方向外方形成的彎曲 面所構成，形成於內輪的滾珠按壓面，是由朝軸方向內方 形成的彎曲面所構成。設置於輪轂的角型的滾珠軸承中， 在外輪的軸方向內側面的最內周面及輪轂軸之間形成間隙 。且，在軸承的軸方向外方裝設有密封構件。因此，在軸 承的軸方向外方使潤滑油不會漏出。 〔專利文獻1〕日本實開昭52 -60062號公報 200528311 (2) 【發明內容】 (本發明所欲解決的課題） 在前述習知的自行車用輪轂中，塗抹於軸承 是不會漏出軸方向外方。但是，因爲在軸承的軸 在外輪及輪轂軸之間形成間隙，所以被充塡於軸 滑油會漏出軸方向內方。特別是，在輪轂軸的外 形成相同螺絲方向的公螺紋部的情況時，藉由對 的車輪（外輪）的相對旋轉就可使公螺紋部如螺 作將潤滑油積極地朝軸方向內方流出。例如，公 右螺紋的情況時，從後方所見的右側的軸承中， 行方向旋轉的話，潤滑油會因公螺紋部的作用而 方向內方流出。潤滑油從軸承流出的話，因離心 至形成於外輪的裏面側的比較寬的空間，被充塡 潤滑油會減少使旋轉變差。 本發明的課題，是抑制被充塡於自行車用輪 滑油從軸承朝軸方向內方流出。 (用以解決課題的手段） 發明1的自行車用輪轂，是裝設於自行車的 行車用輪轂，其是具備：輪轂軸、第1軸承、第 間隙調整構件；前述輪轂軸，是不可旋轉地裝設 行車的車架；前述第1軸承，是具有：對於前述 旋轉自如地裝設在前述輪轂軸的外周側的大致筒 體、及裝設於前述輪轂體的一端的第1外輪、及 的潤滑油 方向內方 承內的潤 周面整體 於輪轂軸 絲泵的動 螺紋部是 車輪朝進 容易朝軸 力而迷走 至軸承的 轂內的潤 車架的自 2軸承、 於前述自 輪轂軸可 狀的輪轂 不可旋轉 -5- 200528311 (3) 地設在相面對於前述輪轂軸 內輪、及配置於前述第1夕^ 滾動構件，將前述輪轂體的 輪轂軸的方式配置於前述輪 第2軸承，是具有：裝設於 、及不可旋轉地設在相面對 的位置的第2內輪、及配置 間的複數第2滾動構件，並 如地支撐於前述輪轂軸的方 轂軸之間；前述間隙調整構 前述第2外輪的至少任一的 述輪轂軸間隙變窄。 在此自行車用輪轂中， 向旋轉的話，隨其使被充塡 兩外輪及輪轂軸的間隙朝軸 軸形成公螺紋部的話，就容 任一的軸方向內方因爲配置 間隙調整構件，所以外輪及 轂軸形成公螺紋部也可以抑 流出。 發明2的自行車用輪轂 1及第2外輪，是分別具有 前述第1及第2內輪，是分 壓面。這種情況，因爲成爲 的前述第1外輪的位置的第1 輪及第1內輪之間的複數第1 一端可旋轉自如地支撐於前述 轂體及前述輪轂軸之間；前述 前述輪轂體的他端的第2外輪 於前述輪轂軸的前述第2外輪 於前述第2外輪及第2內輪之 將前述輪轂體的他端可旋轉自 式配置於前述輪轂體及前述輪 件，是配置於前述第1外輪及 軸方向內側，使前述外輪及前 與車輪一起使輪轂體朝進行方 於軸承的潤滑油是流動化並從 方向外方流出。特別是在輪轂 易流出。在此，在兩外輪至少 使外輪及輪轂軸的間隙變窄的 輪轂軸的間隙變窄，即使在輪 制潤滑油從軸承朝軸方向內方 ，是如發明1的輪轂，前述第 朝向外側配置的滾珠承接面， 別具有朝向內側配置的滾珠按 角型的軸承所以對於推力的耐 -6 - 200528311 (4) 負荷會變大，且藉由將內輪朝軸方向內方移動就可調整滾 珠接觸。 發明3的自行車用輪轂，是如發明1或2的輪轂’前 述間隙調整構件，是具有：接觸前述第1及第2外輪的軸 方向內側並裝設於前述輪轂體的凸緣部、及在前述凸緣部 的內周部與前述輪轂軸隔有間隔配置且先端支撐於前述輪 轂體的具有筒狀部的附鳄筒狀構件。這種情況，因爲接觸 外輪的內側面使間隙調整構件的凸緣部裝設於輪轂體’所 以可以無關尺寸外輪的形狀裝設間隙調整構件。 發明4的自行車用輪轂，是如發明1或2的輪轂，前 述輪轂軸，是具有橫跨外周面全面形成的公螺紋部，前述 間隙調整構件，是具有在前述第1及第2外輪的內周側與 前述第1及第2外輪隔有間隔地裝設於前述輪轂軸的1個 或是複數個0型環。這種情況，因爲利用螺絲的凹凸裝 設〇型環就可調整間隙，所以間隙調整構件的結構可簡 素化。且，藉由並列配置複數Ο型環就可更提高潤滑油 流出防止效果。 發明5的自行車用輪轂，是如發明1或2的輪轂，前 述輪轂軸，是具有：設有橫跨外周面全面形成的公螺紋部 ，前述間隙調整構件，是在前述第1及第2外輪的內周側 與前述第1及第2外輪隔有間隔地裝設於前述輪轂軸的具 有熱收縮性的合成樹脂製的筒狀構件。這種情況，只將筒 狀構件裝設於輪轂軸加熱就可簡單將間隙調整構件裝設於 輪轂軸。 200528311 (5) 發明6的自行車用輪轂，是如發明1或2的輪轂，前 述輪轂軸，是具有從至少前述內輪裝設部分朝向軸方向外 方形成於外周面的公螺紋部，前述間隙調整構件，是具有 兩端被裝設於前述第1及第2外輪的內周側且與前述輪轂 軸隔有間隔配置的合成樹脂製的第1筒狀構件。這種情況 ，因爲第1筒狀構件是裝設於外輪的內周側，所以可以抑 制潤滑油的流出，並且在外輪之間因爲是由第1筒狀構件 覆蓋輪轂軸，所以即使潤滑油流出，潤滑油也不會附著於 外輪的裏面側，流出量也會減少。 發明7的自行車用輪轂，是如發明6的輪轂，前述公 螺紋部是右螺紋，前述第2軸承，是配置於朝向前述自行 車的進行方向的右側，前述第1筒狀構件，是具有在前述 第2軸承側以右螺紋形成的母螺紋部。這種情況，藉由母 螺紋部的螺絲泵的作用，抵消在進行方向的右側的由輪轂 軸的公螺紋部所產生的螺絲泵的作用就可更抑制潤滑油的 流出。 發明8的自行車用輪轂，是如發明1至7的任一的輪 轂，具有：連結配置了前述輪轂體的前述第2軸承的他端 ，在外周可裝設由來自前述自行車的曲柄的旋轉驅動的1 個或是複數個鏈輪的鏈輪裝設部，進一步具備：只有前述 曲柄的進行方向的旋轉會傳達至前述輪轂體的自由滾輪。 這種情況，對於後輪轂可抑制潤滑油從軸承朝軸方向內方 流出。 發明9的自行車用輪轂，是如發明8的輪轂，前述輪 -8- 200528311 (6) 轂體’是具有：在一端配置有前述第1軸承的輪轂本體、 及不可旋轉地裝設於前述輪轂本體的他端在與裝設側逆側 的端部配置有前述第2軸承的大致筒狀的動力傳達體，前 述自由浪輪，是具有：在外周具有前述鏈輪裝設部可旋轉 自如地支撐於前述動力傳達體的外周部的驅動體、及配置 於前述驅動體及前述動力傳達體之間，只有前述驅動體的 進行方向的旋轉會傳達至前述動力傳達體的單向離合器。 這種情況，可抑制來自裝設有自由輪轂側及逆側的第1軸 承的潤滑油的流出。 發明1 0的自行車用輪轂，是如發明9的輪轂，前述 間隙調整構件，是具有第2筒狀構件，該第2筒狀構件的 一端是在前述第1外輪的內周側與前述輪轂軸隔有間隔裝 設，他端是裝設於前述輪轂本體的內周面。這種情況，藉 由間隙調整構件就可確實抑制潤滑油從第1軸承流出。特 別是公螺紋部是右螺紋的情況時，加上由輪轂軸所產生的 螺絲泵的效果更可抑制流出。 發明1 1的自行車用輪轂，是如發明1 0的輪轂，前述 第2筒狀構件，他端側是形成比一端側大徑，於途中從一 端側朝向他端側呈錐面狀擴徑。這種情況，可以在他端側 藉由輪轂體保持間隙調整構件。 發明12的自行車用輪轂，是如發明8的輪轂’前述 自由滾輪，是具有：可旋轉自如地支撐於前述輪轂軸且在 外周具有前述鏈輪裝設部的驅動體、及不可旋轉地裝設於 前述驅動體的筒狀構件、及配置於前述筒狀構件及前述輪 -9 - 200528311 (7) 轂體之間只有前述驅動體的進行方向的旋轉會傳達至前 車商Ιχ體的單向離合器。這種情況，可抑制被充塡於第1 第2軸承的潤滑油的流出。 (發明之效果） 依據本發明，因爲在外輪至少任一的軸方向內方配 使外輪及輪轂軸的間隙變窄的間隙調整構件，所以外輪 輪轂軸的間隙會變窄，即使在輪轂軸形成公螺紋部也可 抑制潤滑油從軸承朝軸方向內方流出。 【實施方式】 在第1圖，採用本發明的一實施例的自行車1 ο 1， 道路賽車，具備：具有前叉98的鑽石形的車架102、 固定於前叉9 8的手把1 04、及由鏈條或踏板或撥鏈器 前後的鏈輪等構成的驅動部1 05、及裝設於前叉98及 架102後部且具有輻條99的前輪及後輪106、107、及 後的制動器裝置108、109。在前輪及後輪106、107設 由本發明的一實施例所產生的前輪轂1 0及後輪轂1 2。 前輪轂10，是如第2圖所示，具有：可裝卸自如 裝設在設置於前叉9 8的下端的左右1對的爪部9 8 a輪 軸20、及配置於輪轂軸20的外周側的輪轂體2 1、及配 於輪轂軸20及輪轂體21之間的第1及第2軸承22a 22b ° 輪轂軸2 0，是具有··例如右螺紋的公螺紋部2 3 a 述 及 置 及 以 是 及 或 車 、r· 刖 有 地 轂 置 是 -10- 200528311 (8) 橫跨外周面全面形成的中空的軸本體2 3、及貫通軸本體 23的快拆輪轂桿24、及螺合於快拆輪轂桿24的一端的調 整螺帽2 5、及卡合於快拆輪轂桿24的他端的凸輪操作桿 2 6快拆操作桿式的輪轂軸。在軸本體2 3的一端（第2圖 右端）及調整螺帽25之間以及軸本體23的他端（第2圖 左端）及凸輪操作桿26之間，是裝設有傘形彈簧36a、 36b ° 輪轂體2 1，是例如，鋁合金製的構件，在外周面的 兩端部形成卡止了輻條9 9的輪轂凸緣3 0 a、3 0 b的大致筒 狀的構件。在輪轂體21的兩端面，形成裝設了第1及第 2軸承22a、22b的軸承安裝部21a、21b。 第1及第2軸承22a、22b，是各別具有··第！及第2 外輪31a、31b、及第1及第2內輪32a、32b、及由滾珠 體構成的第1及第2滾動構件3 3 a、3 3 b。第1及第2外 輪3 1 a、3 1 b ’是各別壓入形成於輪轂體2 1的兩端部內周 面的軸承安裝部2 1 a、2 1 b。第1及第2外輪3 1 a、3 1 b， 是分別具有朝向外側配置的滾珠承接面3丨c、3丨d，第1 及桌2內輪3 2 a、3 2 b，是具有分別朝向內側配置的滾珠 按壓面32c、32d。由此，第1及第2軸承22a、22b，是 推力方向的耐負荷大的角滾珠軸承的形態。第1及第2內 輪3 2 a、3 2 b，是螺入形成於輪轂軸2 0的軸本體2 3的公 螺紋部23a’藉由與弟1及弟2內輪32a、32b的軸方向 外方接觸配置的鎖定螺帽35a、35b止轉而成爲在軸方向 移動不能。在第1及第2軸承2 2 a、2 2 b的軸方向外方， -11 - 200528311 (9) 裝設有第1及第2密封構件39a、39b。 在最接近第1及第2外輪3 1 a、3 1 b的軸本體2 3的內 周面、及輪轂軸2 0的軸本體2 3的外周面之間，配置間隙 調整構件3 7 a、3 7 b。間隙調整構件3 7 a、3 7 b，是從接觸 第1及第2內輪32a、3 2b的軸方向內方側面的位置朝軸 方向內方並列配置於軸本體4 4的外周面，分別由3個的 〇型環3 8所構成。間隙調整構件3 7a、3 7b的外周部及第 1及第2外輪3 1 a、3 1 b的內周部的最小間隙，是例如， 窄到0 · 4 m m程度。 在如此結構的前輪轂1 〇中，藉由將間隙調整構件 3 7a、3 7b裝設於輪轂軸20的軸本體23及外輪31a、31b 之間，就可使第1及第2外輪3 1 a、3 1 b的間隙變窄，被 充塡於第1及第2軸承2 2 a、2 2 b的內部的潤滑油就不易 朝軸方向內方流出。特別是在第2圖右側的第2軸承2 2 b 中，藉由公螺紋部23a的螺絲泵的作用使前輪1 〇6朝進行 方向旋轉的話，潤滑油雖容易流出，但是藉由第2外輪 3 lb及輪轂軸20的間隙因爲藉由間隙調整構件37b而變 窄，所以即使在第2軸承2 2 b，潤滑油也不易朝軸方向內 方流出。且，因爲間隙調整構件37a、37b及第1及第1 及第2外輪3 1 a、3 1 b之間有間隙，所以可以抑制因旋轉 變重的旋轉性能的下降。 後輪轂1 2，是如第3圖所示，具有··可裝卸自如地 裝設在被設置於車架102的後部的左右1對的爪部l〇2a 輪轂軸40、及配置於輪轂軸40的外周側的輪轂體4 1、及 -12- 200528311 (10) 配置於輪轂軸40及輪轂體41之間的第1及第2軸承42a 、4 2 b、及連結於輪穀體4 1的第2軸承側且在外周不可旋 轉地裝設具有構成驅動部1 〇 5的例如1 0個的鏈輪的多段 鏈輪1 10的自由滾輪43。 輪轂軸40，是具有例如右螺紋的公螺紋部44a、44b 是由第1軸承42a裝設部分稍從內側朝軸方向外方以及由 自由滾輪4 3裝設部分稍從內側朝軸方向外方形成的中空 的軸本體44的快拆鬆脫式。輪轂軸40的其他的結構，除 了前輪轂1 〇及長度不同以外，因爲同樣而省略說明。 輪轂體4 1，是例如，具有：鋁合金製的筒狀的輪轂 本體45、及不可旋轉地連結於輪轂本體45的動力傳達體 46。輪轂本體45，是在外周面的兩端部形成卡止了輻條 99的輪轂凸緣50a、50b的大致筒狀的構件。在輪轂本體 4 5的一端面（第3圖左端面），形成裝設有第1軸承4 2 a 的軸承安裝部45a。且，在輪轂本體45的內周部的他端 側內周面，形成裝設有間隙調整構件5 7的段差部4 5 b。 動力傳達體4 6，是附階段的圓筒狀的鋼鐵製的構件 ，一端部（第3圖左端部）內周面是例如藉由鋸齒結合不 可旋轉地裝設於輪轂本體45的他端部（第3圖右端部） 。動力傳達體4 6，是使內周部貫通輪轂本體4 5並藉由螺 入輪轂本體4 5的內周面的筒狀螺絲4 7而被固定於輪轂本 體45。在動力傳達體46的他端部（第3圖右端部）外周 面，形成供螺入裝設第2軸承42b用的軸承安裝部46a。 且，在比軸承安裝部46a更深側的外周面，形成供裝設後 -13- 200528311 (11) 述單向離合器61用的離合器裝設凹部46b。且， 器裝設凹部4 6 b的內側外周面，形成可旋轉自如地 由滾輪4 3用的第3軸承6 3的內輪。筒狀螺絲4 7 面及軸本體44的外周面的間隙是窄到〇.4mm程度 窄。因此，從第2軸承42b朝軸方向內方的潤滑油 ，無太大問題。 動力傳達體46，是附階段的圓筒狀的鋼鐵製 ，一端部（第3圖左端部）內周面是例如藉由鋸齒 可旋轉地裝設於輪轂本體4 5的他端部（第3圖右 。動力傳達體46，是使內周部貫通輪轂本體45並 入輪轂本體45的內周面的筒狀螺絲47而被固定於 體4 5。在動力傳達體4 6的他端部（第3圖右端部 面，形成供螺入裝設第2軸承42b用的軸承安裝部 且，在比軸承安裝部46a更深側的外周面，形成供 述單向離合器61用的離合器裝設凹部46b。且， 器裝設凹部46b的內側外周面，形成可旋轉自如地 由滾輪43用的第3軸承63的內輪。筒狀螺絲47 面及軸本體44的外周面的間隙是窄到〇.4mm程度 窄。因此，從第2軸承42b朝軸方向內方的潤滑油 ，不會成爲問題。 第1及第2軸承42a、42b，是各別具有：第1 外輪51a、51b、及第1及第2內輪52a、52b、及 體構成的第1及第2滾動構件53a、5 3b。第1外輪 是壓入形成於輪轂本體4 5的軸承安裝部4 5 a。第 在離合 支撐自 的內周 非常地 的流出 的構件 結合不 端部） 藉由螺 輪轂本 )外周 4 6 a ° 裝設後 在離合 支撐自 的內周 非常地 的流出 及第2 由滾珠 5 1a， 2軸承 -14- 200528311 (12) 42b，是螺入固定於形成於動力傳達體46軸承安裝部46a 。第2外輪5 1 b，是兼用可旋轉自如地支撐自由滾輪43 的第4軸承64的內輪。第1及第2外輪5 1 a、5 1 b，是分 別具有朝向外側配置的滾珠承接面5 1 c、5 1 d，第1及第2 內輪52a、5 2b，是分別具有朝向內側配置的滾珠按壓面 52c、52d。由此，第1及第2軸承42a、42b，也成爲推 力方向的耐負荷大的角滾珠軸承的形態。第1及第2內輪 5 2a、5 2b，是螺入形成於輪轂軸40的軸本體44的成公螺 紋部44a、44b，藉由朝第1及第2內輪52a、52b的軸方 向外方接觸配置的鎖定螺帽5 5 a、5 5 b止轉而朝軸方向移 動不能。在第1軸承42a的軸方向外方裝設有密封構件 59。因此，潤滑油不易從第1軸承42a朝軸方向外方流出 〇 在接近第1外輪5 1 a的最輪轂軸· 40的內周面，裝設 有間隙調整構件5 7。間隙調整構件5 7，是一端在第1外 輪5 1 a的內周側與輪轂軸4 0隔有間隔裝設而他端是裝設 於輪轂本體4 5的段差部4 5 b的筒狀構件5 8。間隙調整構 件5 7 ’是他端側形成比一端側大徑，於途中從一端側朝 向他端側錐面狀擴徑。間隙調整構件5 7的一端側的內周 部及輪轂軸4 〇的軸本體4 4的公螺紋部4 4 a的間隙，是窄 到0.4 m m程度。 自由滾輪4 3，是具有：在外周具有裝設了多段鏈輪 1 1 0的鏈輪裝設部6〇a，可旋轉自如地支撐於動力傳達體 4 6的外周邰的驅動體6 0 ;及配置於驅動體6 0及動力傳達 -15- (13) (13)200528311 體46之間，只有驅動體60的進行方向的旋轉會傳達至動 力傳達體46的單向離合器61。驅動體60，是藉由第3及 第4軸承6 3、6 4可旋轉自如地支撐於動力傳達體4 6。單 向離合器6 1，是可擺動自如地裝設於動力傳達體46的離 合器裝設凹部46b的爪式，可將驅動體60的旋轉傳達至 動力傳達體4 6。 驅動體60及輪轂軸40的間隙以及驅動體60及動力 傳達體46的間隙是藉由密封構件66、67分別被密封。因 此在自由滾輪43側不易產生潤滑油的朝外部的流出。 在如此結構的後輪轂1 2中，與前輪轂1 0同樣，藉由 將間隙調整構件5 7裝設於第1外輪5 1 a的內周面，使第 1外輪5 1 a及輪轂軸40的軸本體44的間隙變窄，被充塡 於第1軸承42a的內部的潤滑油就不易朝軸方向內方流出 。特別是，第3圖左側的第1軸承42a的情況，公螺紋部 44a因爲是右螺紋，所以可作爲螺絲泵的作用使後輪ι〇7 朝進行方向旋轉的話，潤滑油就容易朝第3圖左側流動。 因此，可更抑制潤滑油的朝軸方向內方（第3圖右方）白勺 流出。 〔其他的實施例〕 (a )在前述實施例中，雖使用0型環3 8作爲前輪轂 10的間隙調整構件37a、37b，如第4圖所示，例如，將 具有裝設在與輪轂軸20的軸本體23的第1及第2外輪 3 1 a、3 1 b相面對的位置的熱收縮性的合成樹脂製的筒狀 -16- (14) 200528311 構件1 3 8作爲間隙調整構件；[3 7 a、1 3 7 b使用也可以。即 使此情況藉由將間隙調整構件1 3 7a、1 3 7b裝設於公螺紋 邰2 3 a ’就可使第1及第2外輪3 1 a、3 1 b及公螺紋部2 3 a 的間隙變窄。其最小間隙，是〇.4mm程度較佳。 (b )如第5圖所示，作爲兩外輪3 1 a、3 1 b連繫間隙 調整構件2 3 7的話，由合成樹脂或是金屬製的筒狀構件 23 8構成也可以。間隙調整構件23 7，是具有··各別卡合 於第1及第2外輪3 1 a、3 1 b的內側面的第1及第2卡合 部23 7a、2 3 7b、及連繫那些的連結筒23 7c。在此實施例 中，藉由將間隙調整構件2 3 7裝設於第1及第2外輪3 1 a 、3 1 b，就可使第1及第2外輪3〗a、3丨b及輪轂軸2 〇的 軸本體23的公螺紋部23a的間隙變窄。輪轂軸2〇的公螺 紋部2 3 a及間隙調整構件2 3 7的內周面的最小間隙，是 0.4 m m程度較佳。 然而’如第6圖所示，間隙調整構件3 3 7的第2軸承 2 2 b側的內周面，具體上，在連結筒3 3 7 ^的右側部分及 第2卡合邰3 3 7 b的內周面形成例如右螺紋的母螺紋部 3 3 7 d，藉由母螺紋部3 3 7 d的螺絲泵的作用抵消公螺紋部 23a的螺絲泵的作用，或是製作朝越限的軸方向外方的流 動也可以。此情況，在第2軸承2 2 b側的潤滑油的流出會 更減少。 (c )在前述實施例中，對於前輪轂橫跨輪轂軸的外 周面全面形成公螺紋部，但是如第7圖所示，只在輪轂軸 420的第1及第2軸承422a、422b的第1及第2內輪 -17- 200528311 (15) 432a、432b裝設部分具有公螺紋部420a、420b的前輪穀 410也適用本發明。此前輪轂410，是具有接觸第1及第 2外輪43 1a、43 1b的軸方向內側面的方式裝設於輪轂體 421的內周面的第1及第2間隙調整構件43 7a、43 7b。第 1及第2間隙調整構件43 7a、43 7b，是附鍔筒狀構件，具 有：裝設於輪轂體421的內周面且接觸第1及第2外輪 43 1a、43 1b的軸方向內側面的大徑的第丨及第2凸緣部 43 7c、43 7d、及先端被支撐於從第1及第2凸緣部43 7c 、4 3 7 d的內周部分朝軸方向內方延伸·縮徑的輪轂體2 1 的內周面的筒狀部43 7e、43 7f。第1及第2凸緣部43 7c 、437d的內周部，是比第1及第2筒狀部437e、437f稍 朝內側突出。第1及第2凸緣部4 3 7 c、4 3 7 d的內周部與 輪轂軸420的外周面的間隙，是〇.4mm程度較佳。 這種結構的間隙調整構件4 3 7 a、4 3 7 b，是如第8圖 所不’採用後輪穀4 1 2也可以。 後輪轂412，是具有：輪轂軸440、及輪轂體441、 及第1及第2軸承442a、442b、及自由滾輪443。自由滾 輪443，是具有：可旋轉自如地支撐於輪轂軸440且在外 周具有裝設了多段鏈輪1 10的鏈輪裝設部460a的驅動體 460、及不可旋轉地裝設於驅動體460的筒狀構件462、 及配置於筒狀構件462及輪轂體42 1之間，只有驅動體 460的進行方向的旋轉會傳達至輪轂體的單向離合器461 。在驅動體4 6 0及輪轂軸4 4 0之間裝設第3及第4軸承 4 6 3、4 6 4。第3及第4軸承，是使用市售的密封滾珠軸承 -18- (16) 200528311 在此如結構的後輪轂4 1 2 ’是輪轂體 2軸承442a、442b的位置關係因爲與前車j 所以可以使用略同樣的間隙調整構件43 7a 【圖式簡單說明】 〔第1圖〕採用本發明的一實施例的 〇 〔第2圖〕其前輪轂的半截剖面圖。 〔第3圖〕其後輪轂的半截剖面圖 〔第4圖〕其他實施例的相當於第2 E 〔第5圖〕其他的實施例的相當於第 〔第6圖〕其他的實施例的相當於第 〔第7圖〕其他的實施例的相當於第 〔第8圖〕其他的實施例的相當於第 【主要元件符號說明】 1 〇 :前輪轂 1 2 :後輪轂 2 0 :輪轂軸 2 1 :輪轂體 2 1 a、2 1 b :軸承安裝部 22a、22b:第1及第2軸承 2 3 :軸本體 441及第1及第 寄轂4 1 0相似， 、437b ° 自行車的側面圖 圏的圖。 2圖的圖。 2圖的圖。 2圖的圖。 3圖的圖。 -19- (17) (17)200528311 2 3 a :公螺紋部 24 :快拆輪轂桿 2 5 :調整螺帽 26 :凸輪操作桿 30a、30b :輪轂凸緣 3 1a、31b：外輪 3 1 c、3 1 d :球承接面 32a、32b ：內輪 32c、32d:球按壓面 3 3 a、3 3 b :滾動構件 3 5 a、3 5 b :鎖定螺帽 3 6 a、3 6 b :傘形彈賛 3 7a、3 7b :間隙調整構件 3 8 : Ο型環 39a、39b :第1及第2密封構件 4 0 :輪轂軸 41 :輪轂體 4 2 a :第1軸承 4 2 b :第2軸承 4 3 :自由滾輪 4 4 :軸本體 4 4 a、4 4 b :公螺紋部 45 :輪轂本體 4 5 a :軸承安裝部 -20- 200528311 (18) 45b :段差部 46 :動力傳達體 4 6 a :軸承安裝部 46b :離合器裝設凹部 47 :筒狀螺絲 5 0 a、5 0 b :輪轂凸緣 5 1 a :第1外輪 5 1 b :第2外輪 5 1 c、5 1 d :球承接面 52a、52b :第1及第2內輪 5 2 c、5 2 d :球按壓面 5 3 a、5 3 b :滾動構件 5 5 a、5 5 b :鎖定螺帽 5 7 :間隙調整構件 5 8 :筒狀部材 5 9 :密封構件 60 :驅動體 6 0 a :鏈輪裝設部 61 :單向離合器 6 3 :第3軸承 6 4 :第4軸承 6 6、6 7 :密封構件 98 :前叉 9 8 a :爪部 -21 (19) (19)200528311 9 9 :輻條 1 0 1 :自行車 1 02 :車架 102a :爪部 1 04 :手把 1 0 5 :驅動部 1 〇 6 :前輪 107 :後輪 1 0 8、1 0 9 :制動器裝置 1 1 〇 :多段鏈輪 1 3 7 a、1 3 7 b :間隙調整構件 1 3 8 :筒狀部材 23 7 :間隙調整構件 23 7a :第1卡合部 23 7b ：第2卡合部 2 3 7 c :連結筒 2 3 8 :筒狀部材 3 3 7 :間隙調整構件 3 3 7b ：第2卡合部 3 3 7c ：連結筒 3 3 7 d :母螺紋部 4 1 0 :前輪轂 4 1 2 :後輪轂 4 2 0 :輪轂軸 -22 (20) (20)200528311 4 2 0 a、4 2 0 b :公螺紋部 421 :輪轂體 422a、422b:第1及第2軸承 431a、431b :第1及第2外輪 432a、43 2b :第1及第2內輪 4 3 7 a、4 3 7 b :間隙調整構件 4 3 7a、43 7b :第1及第2間隙調整構件 437c、437d:第1及第2凸緣部 4 3 7 e、4 3 7 f :筒狀部 4 4 0 :輪轂軸 441 :輪轂體 4 4 2 a、4 4 2 b ··第1及第2軸承 443 :自由滾輪 460 :驅動體 460a ：鏈輪裝設部 461 :單向離合器 462 :筒狀部材 4 6 3 :第3軸承 4 6 4 :第4軸承200528311 ⑴ IX. Description of the invention [Technical field to which the invention belongs] The present invention relates to a wheel hub, and more particularly to a bicycle wheel hub mounted on a bicycle frame. [Prior Art] Generally, a hub provided at the center of a wheel of a bicycle includes a hub shaft that is non-rotatably mounted on a bicycle frame (for example, a front fork), and the hub is rotatably mounted on the shaft. A hub body provided on the outer peripheral side of the hub shaft, and a pair of bearings that allow the hub body to be rotatably supported by the hub shaft (for example, Patent Documents 丨). A male screw portion is formed on the outer periphery of the hub shaft, and the nut is attached to the frame by nuts attached to both ends. A pair of bearings is an angular bearing, which includes an outer wheel having a ball bearing surface and being mounted on the inner peripheral surface of the hub body, an inner wheel having a ball pressing surface and screwing into the hub shaft, and an interval between the two wheels A plurality of rolling members arranged at intervals in the circumferential direction. The inside of the bearing is filled with lubricating oil for smooth rotation. The ball receiving surface formed on the outer ring of the bearing is formed by a curved surface formed outward in the axial direction, and the ball pressing surface formed on the inner wheel is formed by a curved surface formed inward of the axial direction. In the angular-type ball bearing provided in the hub, a gap is formed between the innermost peripheral surface of the inner side surface in the axial direction of the outer wheel and the hub shaft. In addition, a sealing member is mounted outside the bearing in the axial direction. Therefore, the lubricant is prevented from leaking outside of the bearing in the axial direction. [Patent Document 1] Japanese Unexamined Patent Publication No. 52-60062 200528311 (2) [Summary of the Invention] (Problems to be Solved by the Invention) In the conventional bicycle hub described above, the bearing does not leak out in the direction of the shaft Foreign party. However, since a gap is formed between the outer wheel and the hub shaft in the shaft of the bearing, the shaft is filled with oil, and the oil may leak out of the shaft direction. In particular, when a male screw portion with the same screw direction is formed on the outside of the hub shaft, the male screw portion such as a screw can positively lubricate the lubricant inward in the axial direction by the relative rotation of the wheel (outer wheel). Outflow. For example, in the case of a male right-hand thread, when the bearing is rotated in the row direction from the right bearing seen from the rear, the lubricant will flow inward due to the action of the male thread. If the lubricating oil flows out of the bearing, it will be centrifuged to a relatively wide space formed on the inner side of the outer ring, so the lubricating oil will be filled and the rotation will be deteriorated. An object of the present invention is to suppress the outflow of the bicycle lubricating oil from the bearing inwardly from the bearing. (Means for Solving the Problems) The bicycle hub according to the first invention is a wheel hub for a bicycle mounted on a bicycle. The bicycle hub includes a hub shaft, a first bearing, and a first gap adjusting member. The hub shaft is non-rotatably mounted. The frame on which the traveling vehicle is mounted; the first bearing includes a substantially cylindrical body rotatably mounted on the outer peripheral side of the hub shaft, and a first outer wheel mounted on one end of the hub body, and The lubricating surface in the inner bearing in the lubricating oil direction is entirely on the movable thread part of the hub shaft wire pump. It is a self-lubricating bearing of the lubricating frame which is easy to get into the bearing hub when the wheel is moving toward the axial force. The rotatable hub is not rotatable-5-200528311 (3) It is installed on the opposite side of the inner wheel of the hub shaft, and is arranged on the first night ^ rolling member, and the manner of the hub shaft of the hub body is arranged on the first wheel. The two bearings are a second inner wheel that is installed in and facing each other in a non-rotatable position, and a plurality of second rolling members between the arrangement, and is supported on the square hub shaft of the hub shaft as described above. Between The gap adjustment mechanism of the second outer ring of at least any one of said hub axle narrow the gap. In this bicycle hub, if the clearance between the two outer wheels and the hub shaft is rotated toward the shaft, and the male thread portion is formed toward the shaft shaft, the clearance adjustment member is arranged inward in either axis direction, so the outer wheel It is also possible to suppress the outflow by forming a male thread portion with the hub shaft. A bicycle hub 1 and a second outer wheel according to a second aspect of the present invention include the aforementioned first and second inner wheels, respectively, and are partial pressure surfaces. In this case, the plurality of first ends between the first wheel and the first inner wheel which are the positions of the first outer wheel can be rotatably supported between the hub body and the hub shaft; The second outer wheel on the other end and the second outer wheel on the hub shaft are arranged on the second outer wheel and the second inner wheel so that the other end of the hub body can be rotatably disposed on the hub body and the wheel member, and is disposed on the aforementioned wheel body. The first outer wheel and the inner side in the axial direction cause the outer wheel and the front together with the wheel to move the hub body toward the bearing and the lubricant is fluidized and flows out from the direction. It is easy to flow out especially at the wheel hub. Here, the gap between the hub shaft and the hub shaft is narrowed at least between the two outer wheels. Even in the case where the wheel lubricant is inward from the bearing toward the shaft direction, it is the hub according to the invention 1, and the first side is disposed outward. The ball bearing surface does not have a ball-type angular bearing arranged toward the inside, so it is resistant to thrust -6-200528311 (4) The load will increase, and the ball can be adjusted by moving the inner wheel toward the inside of the shaft contact. A bicycle hub according to a third aspect of the present invention is the hub according to the first or second aspect. The gap adjusting member includes a flange portion that is in contact with the first and second outer wheels in the axial direction and is attached to the hub body. The inner peripheral portion of the flange portion is spaced apart from the hub shaft and is supported at the tip end by a cylindrical member with a crocodile-shaped member having a cylindrical portion. In this case, since the flange portion of the gap adjusting member is attached to the hub body 'by contacting the inner side surface of the outer ring, the gap adjusting member can be installed regardless of the shape of the outer wheel. The bicycle hub according to a fourth aspect is the hub according to the first or second aspect. The hub shaft has a male screw portion formed across the outer peripheral surface, and the gap adjusting member includes the inner portion of the first and second outer wheels. One or a plurality of 0-rings are provided on the peripheral side of the hub shaft at intervals from the first and second outer wheels. In this case, since the gap can be adjusted by using the O-ring of the screw asperity, the structure of the gap adjusting member can be simplified. Furthermore, by arranging a plurality of O-rings in parallel, the effect of preventing lubricating oil outflow can be further improved. A bicycle hub according to a fifth aspect of the present invention is the hub according to the first or second aspect of the invention. The hub shaft is provided with a male screw portion formed across the outer peripheral surface, and the gap adjusting member is provided on the first and second outer wheels. A heat-shrinkable synthetic resin cylindrical member is provided on the inner peripheral side of the hub shaft at a distance from the first and second outer wheels. In this case, the gap adjustment member can be simply mounted on the hub shaft by simply mounting the cylindrical member on the hub shaft and heating it. 200528311 (5) The bicycle hub according to invention 6 is the hub according to invention 1 or 2. The hub shaft is a male threaded portion formed on the outer peripheral surface from at least the inner wheel mounting portion toward the outside in the axial direction. The clearance is described above. The adjusting member is a first cylindrical member made of synthetic resin having both ends mounted on the inner peripheral side of the first and second outer wheels and spaced apart from the hub shaft. In this case, since the first cylindrical member is installed on the inner peripheral side of the outer wheel, the outflow of lubricating oil can be suppressed, and since the hub shaft is covered by the first cylindrical member between the outer wheels, even if the lubricating oil flows out , The lubricating oil will not adhere to the inner side of the outer wheel, and the outflow will be reduced. A bicycle hub according to a seventh aspect of the present invention is the hub according to the sixth aspect, wherein the male thread portion is a right thread, the second bearing is disposed on the right side in the direction of travel of the bicycle, and the first cylindrical member is provided in the aforementioned portion. The second bearing side is a female screw portion formed with a right thread. In this case, the effect of the screw pump caused by the male screw portion of the hub shaft on the right side in the progress direction is offset by the effect of the screw pump of the female thread portion, so that the outflow of lubricating oil can be further suppressed. Invention 8 is a bicycle hub according to any one of Inventions 1 to 7, which has the other end connected to the second bearing in which the hub body is disposed, and can be installed on the outer periphery to be rotated by a crank from the bicycle. The sprocket mounting portion of one or a plurality of sprocket wheels further includes a free roller that transmits only the rotation of the crank in the forward direction to the hub body. In this case, it is possible to prevent the lubricating oil from flowing out of the bearing inward in the axial direction for the rear hub. The bicycle hub according to the invention 9 is the hub according to the invention 8. The wheel-8-200528311 (6) The hub body is a hub body having the first bearing disposed at one end and a non-rotatably mounted hub. The other end of the body is a substantially cylindrical power transmission body in which the second bearing is arranged at an end opposite to the mounting side. The free-wheel is provided with the sprocket mounting portion on the outer periphery rotatably. The driving body supported on the outer peripheral portion of the power transmitting body and the one-way clutch that is arranged between the driving body and the power transmitting body, and only the rotation of the driving body in the direction of transmission is transmitted to the power transmitting body. In this case, the outflow of the lubricating oil from the first bearing on the free hub side and the reverse side can be suppressed. The bicycle hub according to invention 10 is the hub according to invention 9, wherein the gap adjusting member has a second cylindrical member, and one end of the second cylindrical member is on the inner peripheral side of the first outer wheel and the hub shaft. The other end is installed on the inner peripheral surface of the hub body. In this case, the clearance adjustment member can reliably prevent the lubricating oil from flowing out of the first bearing. In particular, when the male thread is a right thread, the effect of the screw pump generated by the hub shaft can suppress the outflow. The bicycle hub according to invention 11 is the hub according to invention 10. The second cylindrical member has a larger diameter on the other end side than the one end side, and expands in a tapered shape from one end side toward the other end halfway. In this case, the gap adjusting member can be held by the hub body on the other end side. According to a twelfth aspect of the invention, a bicycle hub is the hub according to the eighth aspect, wherein the free roller has a driving body rotatably supported on the hub shaft and having the sprocket mounting portion on the outer periphery, and is non-rotatably mounted Cylindrical member between the driving body and the cylindrical member and the wheel-9-200528311 (7) Only the rotation of the driving body in the direction between the hub body is transmitted to the unidirectional body of the former car dealer clutch. In this case, the outflow of the lubricating oil filled in the first and second bearings can be suppressed. (Effects of the Invention) According to the present invention, since the gap adjusting member that narrows the gap between the outer wheel and the hub shaft is provided in at least one of the axial directions of the outer wheel, the gap between the outer wheel hub shaft is narrowed even if the gap is formed on the hub shaft. The male thread portion also prevents the lubricating oil from flowing out of the bearing inward in the axial direction. [Embodiment] In FIG. 1, a bicycle 1 ο 1 according to an embodiment of the present invention is adopted. A road racing vehicle includes a diamond-shaped frame 102 having a front fork 98 and a handlebar 104 fixed to the front fork 9 8. , And a driving part 105 composed of a chain or a pedal or a sprocket before and after a derailleur, etc., and a front wheel and a rear wheel 106, 107, and a rear brake installed on the rear of the front fork 98 and the frame 102 and having spokes 99 Devices 108, 109. The front and rear wheels 106 and 107 are provided with a front wheel hub 10 and a rear wheel hub 12 produced by an embodiment of the present invention. As shown in FIG. 2, the front hub 10 includes a pair of left and right claw portions 9 8 a detachably mounted on a lower end of a front fork 9 8, a wheel shaft 20, and an outer peripheral side of the hub shaft 20. The hub body 2 1 and the first and second bearings 22a 22b ° arranged between the hub shaft 20 and the hub body 21 are hub shafts 20, which are, for example, male screw portions 2 3a with right threads as described above. And the hub is installed on the car and r. The ground is -10- 200528311 (8) Hollow shaft body 2 that is formed across the outer peripheral surface 3, and the quick-release hub rod 24 that penetrates the shaft body 23, and the screw An adjustment nut 25 connected to one end of the quick-release hub lever 24 and a cam operating lever 26 connected to the other end of the quick-release hub lever 24 are a quick-release lever-type hub shaft. Between one end (right end in FIG. 2) of the shaft body 23 and the adjusting nut 25, and between the other end (left end in FIG. 2) of the shaft body 23 and the cam operating lever 26, an umbrella spring 36a, The 36b ° hub body 21 is, for example, a member made of an aluminum alloy, and a substantially cylindrical member in which the hub flanges 3 0 a and 30 b of the spokes 9 are locked is formed at both ends of the outer peripheral surface. On both end faces of the hub body 21, bearing mounting portions 21a and 21b are formed in which first and second bearings 22a and 22b are mounted. The first and second bearings 22a, 22b have their own ... And second outer wheels 31a, 31b, and first and second inner wheels 32a, 32b, and first and second rolling members 3 3a, 3 3b composed of ball bodies. The first and second outer wheels 3 1 a and 3 1 b ′ are bearing mounting portions 2 1 a and 2 1 b which are press-fitted into the inner peripheral surfaces of both end portions of the hub body 21. The first and second outer wheels 3 1 a and 3 1 b have ball bearing surfaces 3 丨 c and 3 丨 d arranged outward, respectively, and the first and table 2 inner wheels 3 2 a and 3 2 b have respectively The ball pressing surfaces 32c and 32d arranged toward the inside. Accordingly, the first and second bearings 22a and 22b are in the form of angular ball bearings having a large load resistance in the thrust direction. The first and second inner wheels 3 2 a and 3 2 b are the male screw portions 23 a ′ screwed into the shaft body 2 3 of the hub shaft 20 through the shafts of the inner wheels 32 a and 32 b with the younger brothers 1 and 2. The lock nuts 35a and 35b arranged in contact with the outer direction are prevented from rotating and cannot move in the axial direction. Outside the first and second bearings 2 2 a and 2 2 b in the axial direction, -11-200528311 (9) The first and second seal members 39 a and 39 b are installed. A gap adjusting member 3 7 a is arranged between the inner peripheral surface of the shaft body 23 closest to the first and second outer wheels 3 1 a, 3 1 b and the outer peripheral surface of the shaft body 2 3 of the hub shaft 20. 3 7 b. The gap adjusting members 3 7 a and 3 7 b are arranged side by side on the outer peripheral surface of the shaft body 44 from the position in contact with the inner sides of the axial direction of the first and second inner wheels 32 a and 3 2 b toward the inner side of the axial direction. It consists of three O-rings 38. The minimum clearances of the outer peripheral portions of the gap adjusting members 37a and 37b and the inner peripheral portions of the first and second outer wheels 3a and 31b are, for example, as narrow as about 0.4 mm. In the front hub 10 having such a structure, the first and second outer wheels 3 1 can be made by installing the gap adjusting members 37a and 37b between the shaft body 23 of the hub shaft 20 and the outer wheels 31a and 31b. The gap between a and 3 1 b is narrowed, and the lubricating oil filled in the first and second bearings 2 2 a and 2 2 b is difficult to flow out inward in the axial direction. In particular, in the second bearing 2 2 b on the right side of FIG. 2, if the front wheel 10 is rotated in the forward direction by the action of the screw pump of the male screw portion 23 a, the lubricating oil easily flows out, but the second outer wheel The gap between the 3 lb and the hub shaft 20 is narrowed by the gap adjustment member 37b. Therefore, even in the second bearing 2 2 b, the lubricating oil does not easily flow inward in the shaft direction. Furthermore, since there is a gap between the gap adjustment members 37a, 37b and the first and first and second outer wheels 3 1a, 3 1 b, it is possible to suppress a reduction in the rotation performance due to the rotation. As shown in FIG. 3, the rear hub 12 has a pair of left and right claw portions 102a which are detachably mounted on the left and right pairs of the frame 102, and the hub shaft 40 and the hub shaft 40 Hub body 4 1 on the outer peripheral side of 40, and -12-200528311 (10) First and second bearings 42a, 4 2 b, which are arranged between the hub shaft 40 and the hub body 41, and are connected to the wheel valley body 4 1 On the second bearing side, a free roller 43 having a multi-stage sprocket 1 10 including, for example, 10 sprocket wheels constituting the drive unit 105 is mounted on the outer periphery so as to be non-rotatable. The hub shaft 40 has, for example, male thread portions 44a and 44b with right threads. The mounting portion of the first bearing 42a is slightly outward from the inside toward the axial direction, and the mounting portion of the free roller 43 is slightly outward from the inside toward the axial direction. The formed hollow shaft body 44 is of a quick release type. The other structure of the hub shaft 40 is the same as that of the front hub 10 and the length is different, so the description will be omitted. The hub body 41 is, for example, a cylindrical hub body 45 made of an aluminum alloy and a power transmission body 46 which is non-rotatably connected to the hub body 45. The hub body 45 is a substantially cylindrical member in which hub flanges 50a, 50b are formed at both ends of the outer peripheral surface, and the spokes 99 are locked. A bearing mounting portion 45a on which the first bearing 4 2 a is mounted is formed on one end surface (the left end surface in FIG. 3) of the hub body 45. A stepped portion 4 5 b on which the gap adjustment member 57 is mounted is formed on the other inner peripheral surface of the inner peripheral portion of the hub body 45. The power transmitting body 46 is a cylindrical steel member with stages. The inner peripheral surface of one end portion (the left end portion in FIG. 3) is, for example, non-rotatably attached to the other end portion of the hub body 45 by a saw tooth connection. (Figure 3 right end). The power transmitting body 46 is fixed to the hub body 45 by a cylindrical screw 47 passing the inner peripheral portion of the hub body 45 and screwing into the inner peripheral surface of the hub body 45. On the outer peripheral surface of the other end portion (right end portion in Fig. 3) of the power transmitting body 46, a bearing mounting portion 46a for screwing in the second bearing 42b is formed. Further, the outer peripheral surface on the deeper side than the bearing mounting portion 46a is formed with a clutch mounting recess 46b for the one-way clutch 61 described below after installation. (13) 200528311 (11) In addition, the inner peripheral surface of the recessed portion 4 6 b is provided to form an inner wheel which is rotatable by a third bearing 6 3 for the roller 4 3. The gap between the surface of the cylindrical screw 4 7 and the outer peripheral surface of the shaft body 44 is narrow to about 0.4 mm. Therefore, there is not much problem with the lubricating oil inward from the second bearing 42b in the axial direction. The power transmitting body 46 is a cylindrical steel made with stages, and the inner peripheral surface of one end portion (the left end portion in FIG. 3) is, for example, the other end portion (the third end portion) rotatably mounted on the hub body 45 by saw teeth. Figure right. The power transmitting body 46 is a cylindrical screw 47 having an inner peripheral portion penetrating the hub body 45 and incorporated into the inner peripheral surface of the hub body 45, and is fixed to the body 45. At the other end of the power transmitting body 46, ( In the right end surface of FIG. 3, a bearing mounting portion for screwing in the second bearing 42b is formed, and a clutch mounting recess 46b for the one-way clutch 61 is formed on the outer peripheral surface on the deeper side than the bearing mounting portion 46a. In addition, the inner peripheral surface of the device mounting recess 46b forms an inner wheel which is rotatable by the third bearing 63 for the roller 43. The clearance between the cylindrical screw 47 surface and the outer peripheral surface of the shaft body 44 is narrow to 0.4 mm The degree is narrow. Therefore, the lubricating oil inward from the second bearing 42b is not a problem. The first and second bearings 42a and 42b each have the first outer wheels 51a and 51b, and the first and second bearings 51a and 51b, respectively. The second inner wheels 52a, 52b, and the first and second rolling members 53a, 5 3b constituted by the body. The first outer wheel is press-fitted The bearing mounting part 4 5 a formed in the hub body 45. The first part which is very outflowing on the inner periphery of the clutch support is not combined with the end part.) By the screw hub itself) The outer periphery 4 6 a ° After installation, it is supported on the clutch. Outflow from the inner periphery and the second ball 5 1a, 2 bearing -14-200528311 (12) 42b are screwed and fixed to the bearing mounting portion 46a formed in the power transmission body 46. The second outer wheel 5 1 b is an inner wheel that also serves as a fourth bearing 64 that rotatably supports the free roller 43. The first and second outer wheels 5 1 a and 5 1 b each have ball bearing surfaces 5 1 c and 5 1 d arranged toward the outside, and the first and second inner wheels 52 a and 5 2 b are respectively arranged toward the inner side. Ball pressing surfaces 52c, 52d. Accordingly, the first and second bearings 42a and 42b also take the form of angular ball bearings having a large load resistance in the thrust direction. The first and second inner wheels 5 2a, 5 2b are male threaded portions 44a, 44b screwed into the shaft body 44 of the hub shaft 40, and are directed in the axial direction of the first and second inner wheels 52a, 52b. Locking nuts 5 5 a and 5 5 b that are placed in contact with the outside cannot be turned in the direction of the shaft until they stop rotating. A sealing member 59 is mounted outside the first bearing 42a in the axial direction. Therefore, it is difficult for the lubricating oil to flow out from the first bearing 42a outward in the axial direction. On the inner peripheral surface of the outermost hub shaft · 40 close to the first outer wheel 5 1 a, a gap adjusting member 57 is provided. The gap adjusting member 57 is a cylindrical member having one end spaced from the hub shaft 40 on the inner peripheral side of the first outer wheel 5 1 a and the other end being a stepped portion 4 5 b installed on the hub body 45. 5 8. The gap adjusting member 5 7 ′ has a larger diameter on the other end side than the one end side, and expands in a tapered shape from the one end side toward the other end side on the way. The clearance between the inner peripheral portion of the one end side of the clearance adjustment member 57 and the male screw portion 4 4 a of the shaft body 44 of the hub shaft 40 is as narrow as about 0.4 mm. The free roller 43 is a driving body 6 0 having a sprocket mounting portion 60a provided with a plurality of sprocket wheels 1 10 on the outer periphery, and rotatably supported on the outer periphery of the power transmitting body 4 6; It is arranged between the driving body 60 and the power transmission -15- (13) (13) 200528311 body 46. Only the rotation of the driving body 60 in the direction of transmission is transmitted to the one-way clutch 61 of the power transmission body 46. The driving body 60 is rotatably supported on the power transmitting body 46 by the third and fourth bearings 6 3 and 6 4. The one-way clutch 61 is a claw type of a clutch mounting recess 46b rotatably mounted on the power transmitting body 46, and can transmit the rotation of the driving body 60 to the power transmitting body 46. The gap between the driving body 60 and the hub shaft 40 and the gap between the driving body 60 and the power transmitting body 46 are sealed by sealing members 66 and 67, respectively. Therefore, it is difficult to cause the lubricant to flow out to the outside on the free roller 43 side. In the rear hub 12 having such a structure, the first outer wheel 5 1 a and the hub shaft 40 are mounted on the inner peripheral surface of the first outer wheel 5 1 a in the same manner as the front hub 10. The clearance of the shaft body 44 is narrowed, and the lubricating oil filled in the first bearing 42a cannot easily flow out inward in the shaft direction. In particular, in the case of the first bearing 42a on the left side of FIG. 3, since the male screw portion 44a is a right thread, it can act as a screw pump to rotate the rear wheel ι7 in the forward direction, and the lubricant will easily move toward the third Flow on the left. Therefore, it is possible to further suppress the lubricating oil from flowing out toward the inside of the axis (right of Fig. 3). [Other Embodiments] (a) In the foregoing embodiment, although the 0-ring 38 was used as the gap adjusting members 37a and 37b of the front hub 10, as shown in FIG. The first and second outer wheels 3 1 a, 3 1 b of the shaft body 23 of the shaft 20 are made of a heat-shrinkable synthetic resin tubular shape at a position facing each other -16- (14) 200528311 The member 1 3 8 is used for clearance adjustment Component; [3 7 a, 1 3 7 b can also be used. Even in this case, by installing the clearance adjusting members 1 3 7a, 1 3 7b on the male thread 邰 2 3 a ', the first and second outer wheels 3 1 a, 3 1 b, and the male thread portion 2 3 a The gap becomes narrower. The minimum clearance is preferably about 0.4 mm. (b) As shown in FIG. 5, the two outer wheels 3 1 a and 3 1 b may be connected with the gap adjusting member 2 3 7 by a synthetic resin or metal cylindrical member 23 8. The gap adjusting member 23 7 is a first and second engaging portion 23 7a, 2 3 7b, and a connection having inner surfaces of the first and second outer wheels 3 1 a and 3 1 b, respectively. Those of the connecting tube 23 7c. In this embodiment, by installing the gap adjusting member 2 3 7 on the first and second outer wheels 3 1 a and 3 1 b, the first and second outer wheels 3 a, 3 b and the hub can be made. The clearance of the male screw portion 23a of the shaft body 23 of the shaft 20 is narrowed. The minimum clearance on the inner peripheral surface of the male screw portion 23a of the hub shaft 20 and the clearance adjustment member 237 is preferably about 0.4 mm. However, as shown in FIG. 6, the inner peripheral surface on the side of the second bearing 2 2 b of the gap adjusting member 3 3 7, specifically, on the right side of the connecting cylinder 3 3 7 ^ and the second engagement 邰 3 3 7 The inner peripheral surface of b is formed with, for example, a right-threaded female screw portion 3 3 7 d, and the role of the screw pump of the female screw portion 3 3 7 d is used to offset the role of the screw pump of the male screw portion 23 a, or it may be manufactured to cross the limit. Outward flow in the axial direction is also possible. In this case, the outflow of the lubricating oil on the second bearing 2 2 b side is further reduced. (c) In the foregoing embodiment, a male screw portion is formed across the outer peripheral surface of the hub shaft across the front hub. However, as shown in FIG. 7, only the first and second bearings 422a, 422b of the hub shaft 420 are formed. 1st and 2nd inner wheels-17- 200528311 (15) The front wheel valley 410 provided with male screw portions 420a and 420b in the mounting portions 432a and 432b is also applicable to the present invention. Previously, the hub 410 has first and second gap adjusting members 43 7a and 43 7b provided on the inner peripheral surface of the hub body 421 so as to have contact with the inner side surfaces in the axial direction of the first and second outer wheels 43 1a and 43 1b. The first and second gap adjusting members 43 7a and 43 7b are cymbal-shaped members, and are provided on the inner peripheral surface of the hub body 421 and contact the first and second outer wheels 43 1a and 43 1b in the axial direction. The first and second flange portions 43 7c, 43 7d, and the apex of the large diameter on the side are supported to extend inwardly from the inner peripheral portions of the first and second flange portions 43 7c and 4 3 7 d in the axial direction. The cylindrical portions 43 7e and 43 7f on the inner peripheral surface of the reduced-diameter hub body 2 1. The inner peripheral portions of the first and second flange portions 43 7c and 437d protrude slightly inward than the first and second cylindrical portions 437e and 437f. The clearance between the inner peripheral portions of the first and second flange portions 4 3 7 c and 4 3 7 d and the outer peripheral surface of the hub shaft 420 is preferably about 0.4 mm. The gap adjusting members 4 3 7 a and 4 3 7 b having such a structure may be rear wheel valleys 4 1 2 as shown in FIG. 8. The rear hub 412 includes a hub shaft 440, a hub body 441, first and second bearings 442a and 442b, and a free roller 443. The free roller 443 includes a driving body 460 rotatably supported by the hub shaft 440 and having a sprocket mounting portion 460a on which a plurality of sprocket wheels 10 are mounted on the outer periphery, and a non-rotatably mounted driving body 460 The cylindrical member 462 is arranged between the cylindrical member 462 and the hub body 421, and only the rotation in the direction of the driving body 460 is transmitted to the one-way clutch 461 of the hub body. The third and fourth bearings 4 6 3 and 4 6 4 are installed between the driving body 4 6 0 and the hub shaft 4 4 0. The third and fourth bearings are commercially available sealed ball bearings-18- (16) 200528311 Here, the rear hub 4 1 2 'is a hub body 2 bearing 442a, 442b because of the positional relationship with the front car j, so A slightly similar gap adjusting member 43 7a can be used. [Brief Description of the Drawings] [Figure 1] A half cross-sectional view of a front hub using an embodiment of the present invention [Figure 2]. [Fig. 3] A half cross-sectional view of the rear hub [Fig. 4] The equivalent of the other embodiment is equivalent to the 2E [Fig. 5] The equivalent of the other embodiment is equivalent to the [[6]] other embodiment [FIG. 7] The other embodiment is equivalent to [[FIG. 8] The other embodiment is equivalent to [the description of the main component symbols] 1 〇: the front hub 1 2: the rear hub 2 0: the hub shaft 2 1: hub body 2 1 a, 2 1 b: bearing mounting portions 22a, 22b: first and second bearings 2 3: shaft body 441, first and first hub 4 1 0, 437b ° side view of bicycle Puppet figure. 2 diagrams. 2 diagrams. 2 diagrams. 3 figure illustration. -19- (17) (17) 200528311 2 3 a: Male thread 24: Quick-release hub lever 2 5: Adjustment nut 26: Cam operating lever 30a, 30b: Hub flange 3 1a, 31b: Outer wheel 3 1 c 3 1 d: Ball receiving surfaces 32a, 32b: Inner wheels 32c, 32d: Ball pressing surfaces 3 3 a, 3 3 b: Rolling members 3 5 a, 3 5 b: Locking nuts 3 6 a, 3 6 b: Umbrella-shaped springs 3 7a, 3 7b: Clearance adjusting member 3 8: O-rings 39a, 39b: First and second sealing members 4 0: Hub shaft 41: Hub body 4 2 a: First bearing 4 2 b: 2nd bearing 4 3: Free roller 4 4: Shaft body 4 4 a, 4 4 b: Male thread part 45: Hub body 4 5 a: Bearing mounting part-20- 200528311 (18) 45b: Segment 46: Power transmission Body 4 6 a: Bearing mounting portion 46 b: Clutch mounting recess 47: Cylindrical screws 5 0 a, 5 0 b: Hub flange 5 1 a: First outer wheel 5 1 b: Second outer wheel 5 1 c, 5 1 d: ball receiving surfaces 52a, 52b: first and second inner wheels 5 2 c, 5 2 d: ball pressing surfaces 5 3 a, 5 3 b: rolling members 5 5 a, 5 5 b: lock nut 5 7 : Clearance adjusting member 5 8: Cylindrical member 5 9: Sealing member 60: Driving body 60 0 a: Sprocket mounting portion 61: One-way clutch 6 3: 3 bearing 6 4: 4th bearing 6 6, 6 7: seal member 98: front fork 9 8 a: claw -21 (19) (19) 200528311 9 9: spoke 1 0 1: bicycle 1 02: frame 102a : Claw 1 04: Handle 1 0 5: Drive 1 〇 6: Front wheel 107: Rear wheel 1 08, 10 9: Brake device 1 1 〇: Multi-stage sprocket 1 3 7 a, 1 3 7 b: Clearance adjusting member 1 3 8: cylindrical member 23 7: clearance adjusting member 23 7a: first engaging portion 23 7b: second engaging portion 2 3 7 c: connecting tube 2 3 8: cylindrical member 3 3 7: Clearance adjusting member 3 3 7b: second engaging portion 3 3 7c: connecting cylinder 3 3 7 d: female screw portion 4 1 0: front hub 4 1 2: rear hub 4 2 0: hub shaft -22 (20) ( 20) 200528311 4 2 0 a, 4 2 0 b: male thread portion 421: hub body 422a, 422b: first and second bearings 431a, 431b: first and second outer wheels 432a, 43 2b: first and second Inner wheels 4 3 7 a, 4 3 7 b: Clearance adjustment members 4 3 7a, 43 7b: First and second clearance adjustment members 437c, 437d: First and second flange portions 4 3 7 e, 4 3 7 f: cylindrical portion 4 4 0: hub shaft 441: hub body 4 4 2 a, 4 4 2 b · first and second bearings 443: free roller 460: drive body 460a: sprocket Installation section 461: one-way clutch 462: cylindrical member 4 6 3: third bearing 4 6 4: fourth bearing